Mikael10

Hello,
Just got New tire on my 19 inch rim.
Front rim 8.5
Rear rim 9.5

The new tires are:
Front 235/40/19
Dear 275/30/19

Is that ok ?

I Think the front tire looks very big

Thanks

CJG

I think it should only be 5 difference. Not 10. As in 35 and 40. Not 30 and 40.

Mikael10

The wheelshop says is it normal

CJG

Mercedes says otherwise:

1. 225/40R19 | 93Y
2. 255/35R19 | 96Y

If you're so sure why are you even asking?

Mikael10

Because I do not trust the shop

CJG

LOL. Then why did you buy them without checking elsewhere first?

alexasa

iTrader: (1)

also an uninformed response (because that measurement is only a ratio of the width of the tire - so a staggered set-up could easily require a difference in ratio greater than 5).

Tire diameter should be within 3% of stock. You are increasing the front diameter and decreasing the rear. Both are within spec of their respective corners but from front to rear they have greater difference than that 3%

This would not only look weird as hell but could also trip internal sensors and cause issues.

What size wheels? anything 9.5 width and below - just spec a 265/35 for the rear and stay with the front at 235/40

Mikael10

So the wheelshop has made a mistake ?
Thanks you so much for the help

CJG

Say what? The numbers I listed are the stock tire sizes per Mercedes. I'd say that's informed.